Book Image

Blockchain Developer's Guide

By : Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty
Book Image

Blockchain Developer's Guide

By: Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty

Overview of this book

Blockchain applications provide a single-shared ledger to eliminate trust issues involving multiple stakeholders. It is the main technical innovation of Bitcoin, where it serves as the public ledger for Bitcoin transactions. Blockchain Developer's Guide takes you through the electrifying world of blockchain technology. It begins with the basic design of a blockchain and elaborates concepts, such as Initial Coin Offerings (ICOs), tokens, smart contracts, and other related terminologies. You will then explore the components of Ethereum, such as Ether tokens, transactions, and smart contracts that you need to build simple DApps. Blockchain Developer's Guide also explains why you must specifically use Solidity for Ethereum-based projects and lets you explore different blockchains with easy-to-follow examples. You will learn a wide range of concepts - beginning with cryptography in cryptocurrencies and including ether security, mining, and smart contracts. You will learn how to use web sockets and various API services for Ethereum. By the end of this Learning Path, you will be able to build efficient decentralized applications. This Learning Path includes content from the following Packt products: • Blockchain Quick Reference by Brenn Hill, Samanyu Chopra, Paul Valencourt • Building Blockchain Projects by Narayan Prusty
Table of Contents (37 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
Index

Introduction to cryptocurrency wallets


A wallet of any cryptocurrency can store multiple public and private keys. The cryptocurrency is itself not contained in the wallet; instead, the cryptocurrency is de-centrally stored and maintained in the public ledger. Every cryptocurrency has a private key with which it is possible to write in the public ledger, which makes spending in the cryptocurrency possible.

It is important to know about the wallets, since keeping the private key secure is crucial in order to keep the currency safe. Wallet is a collection of public and private keys, and each of them is important for the security and anonymity of the currency holder.

Transactions in cryptocurrency wallets

Transactions between wallets are not a transfer of value; instead, the wallets store the private key in them, which is used to sign a transaction. The signature of a transaction is generated from the combination of private and public keys. It is important to store the private key securely.

Wallets...